Heat exchange roll



Sept. 28, 1965 P. L. PENDLETON HEAT EXCHANGE ROLL 2 Sheets-Sheet 1 Filed Dec. 16, 1963 RN M mm a WM v V m M P M R L m M A w aw m9 mm NS mm P 1965 P. L. PENDLETON 3,208,513

HEAT EXCHANGE ROLL Filed Dec. 16, 1963 2 Sheets-Sheet 2 INVENTOR.

' PYAM L. PENDLETON ATTORNE V United States Patent 3,208,513 HEAT EXCHANGE RGLL Pyam L. Pendleton, Warwick, R.I., assignor, by mesne assignments, to Bevis Industries, Inc., Providence, R.I., a corporation of Florida Filed Dec. 16, 1963, Ser. No. 330,724 7 Claims. (Cl. 16590) This invention relates to heat exchange rolls and more particularly to heat exchange rolls through which heat transfer fluid is circulated to control the temperature at the surface of the roll.

Numerous attempts have been made in the past to develop heat exchange rolls having passageways for the flow of heat transfer fluid, thereby to control the surface temperature of the roll.

The rolls heretofore produced while having various types of passageways, made no attempt to control the rate of flow of the heat transfer fluid, nor was an attempt made to control the volume of the heat transfer fluid flowing through the passageway.

It is imperative in the stretching of plastic film to uniformly heat the film and to maintain an absolutely constant temperature on the heat exchange roll, if the film is to be uniformly stretched.

With the exception of the disclosure of the heat exchange roll in assignees prior patent application serial number 127,314 filed July 27, 1961, for a Heat Exchange Roll, now Patent No. 3,120,867, John Crandon Nash, inventor, the prior art fails to disclose a heat exchange roll construction which provides for uniform temperature both longitudinally and circumferentially upon the surface of the heat exchange roll.

Accordingly, it is an object of the present invention to provide a heat exchange roll construction incorporating valve means whereby the flow of heat exchange fluid is volume controlled through the passageways in the heat exchange roll, thereby to provide a uniform temperature both longitudinally and circumferentially across the surface of a heat exchange roll.

Another object of the present invention is to provide ideal heat transfer conditions in a heat exchange roll which results from the tortuous path of the heated fluid through a unique arrangement of passageways in the heat exchange roll.

Still another object of the present invention is to provide a temperature exchange roll for the reception and circulation of a heated fluid or a cooled fluid, whereby the surface of the roll is either uniformly heated or uniformly cooled.

Other objects of the present invention will become apparent in part and be pointed out in part in the following specification and claims.

Like reference numerals refer to like parts in the following drawings in which:

FIGURE 1 is a cross sectional view taken on line 1-1 of FIGURE 5, showing the internal construction of the new and improved heat exchange roll.

FIGURE 2 is a transverse cross sectional view taken along line 22 of FIGURE 1, with the view in the direction of the arrows.

FIGURE 3 is a view similar to view 22 but taken on line 33 of FIGURE 1.

FIGURE 4 is a view similar to view 22 but taken on 4-4 of FIGURE 1.

FIGURE 5 is a side elevational view of the new and improved heat exchange roll.

FIGURE 6 is a perspective view, partly in section, of a feed line distributor.

Reference is now made to the drawings wherein is illustrated a heat exchange roll, generally indicated by reference numeral 11, comprising a shell consisting of an outer longitudinal hollow cylinder 12 provided with a temperature exchange surface 13, an inner longitudinal hollow cylinder 14, a left end plate 15 provided with an axial bore 22 and a right end plate 16, provided with an axial bore 23. Left end plate 15 is welded at 17 to the inner surface 18 of outer longitudinal hollow cylinder 12. Right end plate 16 is welded at 20 to the inner surface 18A of outer longitudinal hollow cylinder 12. Inner longitudinal hollow cylinder 14 is positioned in axial bores 22, 23 and is welded at 24 to left end plate 15 and is welded at 25 to right end plate 16. Inner longitudinal hollow cylinder 14 is provided with three series of ports 26, 27, 28 comprising a plurality of ports in each series and an inner wall 29 forming a chamber 9.

It will be appreciated that a cavity is defined by the walls comprising outer longitudinal hollow cylinder 12, inner longitudinal hollow cylinder 14, left end plate 15 and right end plate 16.

Four disks 30, 31, 32, 33 are provided, respectively, with axial bores 30A, 31A, 32A, 33A, which are slidably mounted upon inner longitudinal hollow cylinder 14 and welded thereto at, respectively, 30B, 31B, 32B, 33B. A circumferential plate 34 is welded at 35 to disk 30 and to disk 31 at 36, thereby providing a hollow space or baffle area 37. A second circumferential plate 38 is welded at 39 to disk 32 and to disk 33 at 40, thereby providing a second hollow space or baflle area 41. In this manner baffle areas 37, 41 reduce the area of the cavity and therefore they reduce the volume of fluid located in said cavity and they provide flow paths from two series of ports to said heat exchange surface and a flow path from said heat exchange surface to said third series of ports.

It will be obvious to one skilled in the art that the disks and plates could be omitted entirely or they could vary in their dimensions so as to adjust the size of the baffle areas.

A left or first trunnion 42 is provided with a shoulder 43 and a reduced diameter 44 which engages inner wall 29 with shoulder 43 abutting the end of inner longitudinal hollow cylinde 14 and is fastened thereto by means of welding at 45. Axially, trunnion 42 is provided with a passageway 46 having a counterbore 47 on one end and a threaded area 48 on the other end.

A flange 50 is welded at 51 to the end of inner longitudinal hollow cylinder 14. A right or second trunnion 52 provided with an axial bore 53 having a wall 54 is fastened to flange 50 by means of bolts 55.

FIGURE 6 illustrates a feed line distributor, generally indicated by reference numeral 60. As illustrated, the feed line distributor is fabricated as a casting having a rim 61, a hub 62 connected to the rim 61 by means of two spokes 63, 64 and oppositely located flanges 65, 66 connected to rim 61 and projecting toward each other but never meeting, thereby providing edges 75, 76, respectively, on flanges 65, 66. The hub 62 is provided with an axial passageway 67 defined by wall 72. The spoke 63 is provided with a port 68 in communication with axial passageway 67. Spoke 64 is provided with a port 69 in communication with axial passageway 67. Flanges 65, 66 provide a groove 70 having an outlet 71 between edges 75, 76.

Two feed line distributors 60 are utilized in the present heat exchange roll. As viewed in FIGURE 1 the feed line distributor shown on the left side of the drawing is reference numeraled as described, supra, and will be referred to as comprising left or first elements. The feed line distributor shown on the right side of the drawing has the reference character A added to the corresponding reference character and will be referred to as comprising right or second elements.

A piece of seamless tubing 80 provided with a duct 81 is welded at 82 to left hub 62 and to right hub 62A at 83. Feed line distributors 60, 60A are positioned in chamber 9 with left outlet 71 aligned for communication with ports 26 and right outlet 71A aligned and in communication with port 28. A spacing collar 85 is located in chamber 9 between right trunnion 52 and right feed line distributor 60A to assist in maintaining the alignment of outlets 71, 71A with ports 26, 28, respectively.

An inlet tube 86 provided with an inlet passageway 87 is projected through axial bore 53 and is located in right axial passageway 67A to provide communication between inlet passageway 87, connecting duct 81 ports 68A, 69A, 68, 69 to form an inlet manifold for the entrance of fluid to said cavity and heat exchange surface 13.

A valve is provided consisting of a valve head 90 provided with a threaded shank 91 and bore 92. Threaded shank 91 is rotatively connected to threaded area 48 with valve head 90 positioned in axial passageway 67. A rod 93 projects into passageway 46 and bore 92 and is fastened to valve head 90 by means of welding at 94. A plurality of gaskets 95 are placed in counterbore 47 around rod 93. A retaining collar 97 is fastened to trunnion 42 by means of screws 98. Rod 93 projects through a bore in retaining collar 97. Rotation of rod 93 rotates valve head in axial passageway 67 to vary the flow of fluid passing from axial passageway 67 to ports 68, 69.

In operation fluid under pressure will flow in the direction of arrow A FIGURE 1, through inlet passageway 87 to axial passageway 67A where the fluid will divide to flow in three directions, as indicated by the arrows 66B?! In one direction the fluid will flow into and through duct 81 to axial passageway 67 where the fluid will flow in two directions as indicated by arrows C when valve head 90 is in open or partially open position as illustrated in FIGURE 1.

The fluid flowing through axial passageway 67 and port 68 will flow through cavity 70 and outlet 71 into and through ports 26 to a heat transfer channel 101 formed between disk 30 and left end plate 15. The fluid flow will continue from heat transfer channel 101 to heat transfer channel 102 and to heat transfer channel 103 through ports 27 to chamber 9.

The fluid flowing through axial passageway 67 will also flow through port 69 and through cavity 70 and outlet 71 into and through ports 26 to heat transfer channels 101, 102, 103 and through port 27 to chamber 9.

The fluid flowing from inlet passageway 87 to axial passageway 67A will also flow through port 68A, cavity 70A, outlet 71A, port 28, heat transfer channels 104, 105, 103, and through ports 27 to chamber 9. The fluid flowing from inlet passageway 87 to axial passageway 67A will also flow through axial passageway 67A, port 69A, cavity 70A, outlet 71A, port 28, heat transfer channels 104, 105, 103 and through ports 27 to chamber 9.

It will be observed that the area of ports 26, 27, 28 is pre-selected to balance the area of said cavity. The area of said cavity subjected to the flow of fluid is reduced by the diameter and position of disks 30, 31, 32, 33 upon inner longitudinal hollow cylinder 14 and the circumferential plates 34, 38 which provide heat transfer channels 101, 102, 103, 104 and 105 of a pre-selected area.

Feed line distributor 60 is provided with flow paths 110 and 111 formed between spokes 63, 64 and rim 61.

Fluid in chamber 9 will flow through fluid spaces 110, 111 to abut the end wall 113 of first or left trunnion 42. The fluid in chamber 9 will also flow through paths 110A, 111A in second or right trunnion 60A and through spacing collar 85 to axial bore or outlet manifold 53 where the fluid will be returned to the unit (not shown) which heats or cools the fluid.

It becomes apparent that valve head 90 is adjustably positioned to control the volume of fluid flowing through axial passageway 67 and therefore the volume of fluid flowing into and out of said cavity. It is also apparent that valve head may hit or seat against the end of tubing 80 to block the flow of fluid passing into axial passageway 67. In this manner the influence of the heat transferred from the fluid by way of volume to outer longitudinal hollow cylinder 12 and the temperature exchange surface 13, is controlled.

A plug is located in right end plate 16 to permit sampling of the fluid flowing through channel 104.

Having shown and described a preferred embodiment of the present invention by way of example, it should be realized that structural changes could be made and other examples given without departing from either the spirit or scope of this invention.

What I claim is:

1. A heat exchange roll comprising an inner cylinder provided with three series of ports and a chamber, a shell, means fastening said shell to said inner cylinder, a cavity between said inner cylinder and said shell, a left side fluid distributor consisting of a left rim provided with a left groove, a left hub provided with a left passageway, left spokes connecting said left hub with said left rim, left ports in said left spokes connecting said left passageway with said left groove, a right side fluid distributor consisting of a right rim provided with a right groove, a right hub provided with a right passageway, right spokes connecting said right hub with said right rim, ports in said right spokes connecting said right passageway with said right groove, right flow paths between said right rim, right hub and right spokes, said left side fluid distributor located in said chamber with said left groove in communication with one of said three series of ports, said right side fluid distributor located in said chamber with said right groove in communication with another of said three series of ports, a tube connecting said left hub with said right hub, an inlet tube, means fastening said inlet tube in said right hub, a right trunnion provided with an axial bore, means fastening said right trunnion to said inner cylinder with said inlet tube projecting through said axial bore and forming an outlet manifold between said inlet tube and said axial bore, said third series of ports in communication between said chamber and said cavity, said right flow paths connecting said chamber with said outlet, a left trunnion provided axially with a passageway having a counterbore and a threaded area, means fastening said left trunnion to said inner cylinder with said passageway aligned with said left passageway, said left trunnion providing an end wall in said chamber, a valve having a valve head, a threaded shank and a bore, said valve head slidably mounted in said left passageway, said threaded shank rotatively mounted in said threaded area, a rod projecting through said passageway in said left trunnion, means fastening one end of said rod in said bore whereby rotation of said rod rotates said valve head into and out of said left passageway to block and unblock said left ports.

2. A heat exchange roll comprising an inner cylinder provided with three series of ports and a chamber, a shell provided with a heat exchange surface, means fastening said shell to said inner cylinder, a cavity between said inner cylinder and said shell, two right side disks, means fastening said two right side disks to said inner cylinder between said first series of ports and said second series of ports, two left side disks, means fastening said two left side disks to said inner cylinder between said second series of ports and said third series of ports, a right circumferential plate, means fastening said right circumferential plate to said two right side disks to provide a fluid flow path from said right groove, through one series of ports to said heat exchange surface, to said second series of ports and to said chamber, a left circumferential plate, means fastening said left circumferential plate to said two left side disks to provide a fluid flow path from said left groove through the third series of ports to said heat exchange surface, to said second series of ports and to said chamber, a left side fluid distributor consisting of a left rim provided with a left groove, a left hub provided with a left passageway, left spokes connecting said left hub with said left rim, left ports in said left spokes connecting said left passageway with said left groove, a right side fluid distributor consisting of a right rim provided with a right groove, a right hub provided with a right passageway, right spokes connecting said right hub with said right rim, right ports in said spokes connecting said right passageway with said right groove, right flow paths between said right rim, right hub and spokes, said left side fluid distributor located in said chamber with said left groove in communciation with one of said three series of ports, said right side fluid distributor located in said chamber with said right groove in communication with another of said three series of ports, a tube connecting said left hub with said right hub, an inlet tube, means fastening said inlet tube in said right hub, a right trunnion provided with an axial bore, means fastening said right trunnion to said inner cylinder with said inlet tube projecting through said axial bore and forming an outlet manifold between said inlet tube and said axial bore, said third series of ports in communication between said chamber and said cavity, said right flow paths connecting said chamber with said outlet, a left trunnion provided axially with a passageway having a counterbore and a threaded area, means fastening said left trunnion to said inner cylinder with said passageway aligned with said left passageway, a valve having a valve head, a threaded shank and a bore, said valve head slidably mounted in said passageway, said threaded shank rotatively mounted in said threaded area, a rod projecting through said passageway in said left trunnion, means fastening one end of said rod in said bore whereby said valve head moves into and out of said left passageway to block and unblock said left ports.

3. A heat exchange roll comprising a shell consisting of a left plate, a right plate, an outer cylinder and an inner cylinder, means fastening said left plate and right plate to said outer cylinder and inner cylinder, respectively, to form a cavity, said inner cylinder having a chamber and a plurality of series of ports connecting said chamber with said cavity, a left side feed line distributor consisting of a left rim provided with flanges forming a left groove with a left side circumferential outlet, a left side hub provided with a left side axial passageway, left spokes radially connecting said left hub and left rim, left ports in said left spokes connecting said left side axial passageway with said left groove and circumferential outlet, a right side feed line distributor consisting of a right rim provided with flanges forming a right groove with a right side circumferential outlet, a right side hub provided with a right side axial passageway, right spokes radially connecting said right hub and right rim, right ports in said right spokes connecting said right side axial passageway with said right groove and circumferential outlet, said left side feed line distributor located in said chamber with said left side circumferential outlet aligned and in communication with one of said plurality of series of ports, said right side feed line distributor located in said chamber with said right side circumferential outlet aligned and in communication with one of said purality of series of ports, a tube provided with a duct, means securing said tube on opposite ends, respectively in said left side hub and right side hub with said duct connecting said left side axial passageway with said right side axial passageway, an inlet tube provided with an inlet passageway, means fastening said inlet tube in said right side hub with said inlet passageway in communication with said right side axial passageway, a second trunnion provided with an axial bore, means fastening said second trunnion to said inner cylinder with said inlet tube projecting through said axial bore and forming an outlet manifold between said inlet tube and said axial bore, said third series of ports in communication with said chamber and said cavity, said right side flow paths connecting said chamber with said outlet, a first trunnion provided axially with a passageway having a counterbore and a threaded area, means fastening said first trunnion to said inner cylinder with said passageway aligned with said left side axial passageway, a valve having a valve head, a threaded shank and a bore, said valve head slidably mounted in said left side axial pas sageway, said threaded shank rotatively mounted in said threaded area, a rod projecting through said passageway in said first trunnion, means fastening one end of said rod in said bore whereby said valve head moves into and out of said left passageway in said left side fluid distributor.

4. A heat exchange roll comprising an inner cylinder provided with a plurality of sets of ports and a chamber, a shell, means fastening said shell to said inner cylinder to define a cavity between said shell and said inner cylinder, a first trunnion, means fastening said first trunnion to said inner cylinder thereby blocking one end of said chamber, a second trunnion provided with an axial bore, means fastening said second trunnion to said inner cylinder, first and second fluid distributors positioned in said chamber in spaced relation to each other, said first fluid distributor arranged to communicate with a first set of said sets of ports opening into said cavity, said second fluid distributor arranged to communicate with a second set of said sets of ports opening into said cavity, an inlet manifold connecting said first and second fluid distributors for introducing fluid to said first and said second fluid distributors for passage to said cavity, an outlet manifold located in said axial bore to receive and discharge said fluid passing into said chamber, from said cavity through a third set of said sets of ports, and control means for regulating the flow of said fluid through said first and second fluid distributors to said cavity.

5. A heat exchange roll comprising an inner cylinder provided with a plurality of sets of ports and a chamber, a shell, means fastening said shell to said inner cylinder to form a cavity between said shell and said inner cylinder, a first trunnion, means fastening said first trunnion to said inner cylinder at said chamber, a second trunnion provided with an axial bore, means fastening said second trunnion to said inner cylinder at the other end of said chamber, baflle means forming fluid heat transfer channels in said cavity between sets of ports, first and second fluid distributors for introducing fluid to said heat transfer channels, an outlet manifold located in said axial bore to receive and discharge fluid from said heat transfer channels, through sets of ports and said chamber, and a valve located in said inlet manifold to control the volume of fluid flowing through said inlet manifold.

6. A heat exchange roll comprising an inner cylinder provided with a plurality of sets of ports and a chamber, a shell, means fastening said shell to said inner cylinder to form a cavity between said shell and said inner cylinder with said plurality of sets of ports providing communication between said chamber and said cavity, a first fluid distributor provided with a first hub and a first horizontal and first radial passageways leading from said first hub, a second fluid distributor provided with a second hub and a second horizontal and second radial passageways leading from said second hub, and fluid spaces, said first fluid distributor positioned in said chamber in communication with a set of ports in said plurality of sets of ports, said second fluid distributor positioned in said chamber in spaced relation to said first fluid distributor and in communication with another set of said plurality of sets of ports, a tube connecting said first hub with said second hub to provide communication between said first hub and said second hub, a first trunnion, means fastening said first trunnion to said inner cylinder to block one end of said chamber, a second trunnion provided with an axial bore, means fastening said second trunnion to said inner cylinder to provide an outlet manifold in said axial bore leading from said chamber, an inlet manifold fastened to said second hub for introducing fluid to said cavity through said first and second fluid distributors, said outlet manifold in communication with said cavity through the remaining ports of said plurality of series of ports, through said chamber and through fluid spaces in said second fluid distributor, and valve control means located in said first hub to control the flow of fluid through said first hub.

7. A heat exchange roll comprising an inner cylinder provided with a first, second and third set of ports and a chamber, a shell, means fastening said shell to said inner cylinder to form a cavity between said shell and said inner cylinder, a first trunnion provided with a passageway, means fastening said first trunnion to said inner cylinder at one end of said chamber, a second trunnion provided with an axial bore, means fastening said second trunnion to said inner cylinder at the other end of said chamber, two disks fastened to said inner cylinder between the first and second set of ports, a plate fastened to said two disks to form a first hollow space and a heat transfer channel connecting the first with the second set of ports, an additional two disks fastened to said inner cylinder between the second and third set of ports, a second plate fastened to said additional two disks to form a second hollow space and a second heat transfer channel connecting the second with the third set of ports, first and second fluid distributors positioned in said chamber in spaced relation to each other, said first fluid distributor and to the second heat transfer channels, an outlet manifold located in said axial bore to receive and discharge said fluid passing from said first and second heat transfer channels, through the second series of ports and chamber, through the fluid spaces to discharge the fluid and valve control means positioned in the first mentioned passageway to control the volume of fluid flowing through said first mentioned heat transfer channel.

References Cited by the Examiner UNITED STATES PATENTS 1,160,109 11/15 Henrici.

1,163,224 12/15 Dodge 34124 2,932,091 4/60 Day 34124 2,956,348 10/60 Mueller --89 X CHARLES SUKALO, Primary Examiner. 

5. A HEAT EXCHANGE ROLL COMPRISING AN INNER CYLINDER PROVIDED WITH A PLURALITY OF SETS OF PORTS AND A CHAMBER, A SHELL, MEANS FASTENING SAID SHELL TO SAID INNER CYLINDER TO FORM A CAVITY BETWEEN SAID SHELL AND SAID INNER CYLINDER, A FIRST TRUNNION, MEANS FASTENING SAID FIRST TRUNNION TO SAID INNER CYLINDER AT SAID CHAMBER, A SECOND TRUNNION PROVIDED WITH AN AXIAL BORE, MEANS FASTENING SAID SECOND TRUNNION TO SAID INNER CYLINDER AT THE OTHER END OF SAID CHAMBER, BAFFLE MEANS FORMING FLUID HEAT TRANSFER CHANNELS IN SAID CAVITY BETWEEN SETS OF PORTS, FIRST AND SECOND FLUID 